Smokeless gunpowder.



UNITED STATES PATENT UFFICE,

CONRADIPAUL ,H'UBERTOLAESSEN, or WILMERSDORF, NEAR BERLIN, GERMANY.

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Specification of Letters Patent.

Patented. Jan. 12, 1-909.

- Application filed. August 9, 1.06. Serial No. 329,801.

Total whom it my concerns;

.=-Be'it known that I, CONRAD PAUL HUBERT CLAnssEn, doctor 'of philosophy, chemist,

subject of Prussia, residing at Wilmersdorf,

. near Berlin, .Gerrnany,-have invented new and useful Improvements n Smokeless Grunpowder, of which the following is aspecification.

In order to lower the temperature of combustionof the nitrocellulose powders or of the nitrocellulosenitroglycerin powders, and

in] order to remove the injurious influence which said'temperatures exert upon the; ma-

terial of the'barrel or the tube, indifferent. substances, for example camphor, were hith erto added to powders of this kind and, in order to increase the stability, diphenyliimin orcarbamids were also used as addition to those powders- Now it "has been proved by experiments that. the above namedpurposes, that is the lowering of the temperature of combustion and the increase of the stability of such pow ders are attained in a much higher degree,

without injuring, at the same time, the bal-' listic properties of the powders, if there are added to the latter entirely substituted carbamids, that is to Say, such 'carbamids in A-nitrocellulose nitroglycerin powder ac-.

cording to my invention may consist of 75 kg; of gun cotton, 25 kg. of nitroglycerin, 5' kg. of diethyldiphenylcarbamid.

I claim A smokeless gunpowder consisting. of a mixture of nitrocellulose and nitroglycerin with about 5% diethyl-diphenyl-carbamid. Y In testimonywhereof I have signed my name to this specification inthe presence of two subscribing witnesses.

CONRAD PAUL HUBERT GLAESSEN.

Witnesses HENRY HASPER, WILLIAM MAYNER. 

